1-7 disubstituted xanthine derivatives having antiasthmatic activity, their physiologically acceptable salts, pharmaceutical compositions containing them and process for their preparation

Abstract

Xanthine derivatives having antiasthmatic activity are disclosed which have the following formula: ##STR1## where R is a linear or branched alkyl chain group of from one to six carbon atoms, R.sub.1 is a linear or branched alkyl or hydroxyalkyl group of from one to six carbon atoms. However, if R is methyl, then R.sub.1 is not methyl, ethyl or propyl; if R is ethyl, then R.sub.1 is not methyl or ethyl; and if R is methyl or n-butyl, then R.sub.1 is not 2-hydroxypropyl. Also disclosed are pharmaceutical compositions containing such xanthine derivatives.

Dependencies are inferred from the claim text.